Frontier Group Holdings, Inc. (the "Company"), parent company of Frontier Airlines, Inc., is updating its adjusted (non-GAAP) diluted loss per share guidance for the first quarter of 2026 and is supplementing its previously issued guidance for the first quarter of 2026 (the "Prior Guidance"), as originally disclosed in the Company's earnings release issued February 11, 2026, ahead of a previously announced moderated discussion at the J.P. Morgan Industrials Conference on March 17, 2026, at 9:30 a.m. ET.

The Company now expects first quarter 2026 adjusted (non-GAAP) diluted loss per share of between $0.32 and $0.44, within the Prior Guidance range, driven by revenue performance during the quarter significantly above expectations, offset by the recent spike in jet fuel prices and substantial operational disruptions arising from Winter Storm Iona on March 15 and 16, 2026, with lingering impacts expected in order to restore normal operations. Underlying expectations regarding first quarter 2026 expected tax expense of $3 to $5 million and approximately 229 million of weighted average shares outstanding on a diluted basis remain unchanged from the Prior Guidance. First quarter 2026 capacity is expected to be down 1 to 1.5 percent compared to the corresponding prior year period, within the Prior Guidance range.